86790016779 has 4 divisors (see below), whose sum is σ = 115720022376. Its totient is φ = 57860011184.

The previous prime is 86790016759. The next prime is 86790016843. The reversal of 86790016779 is 97761009768.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 86790016779 - 2¹³ = 86790008587 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86790016739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14465002794 + ... + 14465002799.

It is an arithmetic number, because the mean of its divisors is an integer number (28930005594).

Almost surely, 2^86790016779 is an apocalyptic number.

86790016779 is a deficient number, since it is larger than the sum of its proper divisors (28930005597).

86790016779 is a wasteful number, since it uses less digits than its factorization.

86790016779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28930005596.

The product of its (nonzero) digits is 8001504, while the sum is 60.

The spelling of 86790016779 in words is "eighty-six billion, seven hundred ninety million, sixteen thousand, seven hundred seventy-nine".